Hmm, I don't quite understand what you mean...
Can you paraphrase?
Do you mean, that GW can be launched with current A9LH?
Then yes, with couple easy tweaks.
You can boot either Luma by default or GW with pressing down while loading.
Or do you mean, that cia can be used in GW or not?
It was never a problem - everything worked in Emunand and should in Sysnand.
The only downside of GW with Emunand for me were long loading, lack of ability to play VC/GBA and DSi, and impossibility to use DS carts without reinstalling exploit after (with A9LH I can swap R4 and GW freely).
Anyway, in any case, you always can use GW mode for .3ds files and Luma for everything else.